Questions tagged [zoology]

The biological study of animals. Very broad use so be sure to add additional clarifying tags

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6answers
6k views

Why didn't Escobar's hippos introduced in a single event die out due to inbreeding

Today I read a BBC Report about how Pablo Escobar had once imported 4 hippos (1 male, 3 female) into his estate in Colombia for his private zoo. After his downfall, while other species were shipped ...
-1
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1answer
100 views

Are the “cocaine hippos” suffering from noticeable inbreeding depression? [duplicate]

Colombia has a population of about 100 "cocaine hippos" founded from a group of one male and three females, which escaped from a drug kingpin's private zoo; it's even estimated that this ...
-6
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1answer
120 views

How did animals on Earth survive without plants?

Around 500 million years ago, there were animals on earth, but there were no plants yet. How did animals survive? I'm assuming some of the animals ate other animals, but did some animals eat rocks or ...
2
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1answer
72 views

Is urban beekeeeping harmful or are there good practices to follow?

I have found several newspaper articles on how good could be urban beekeeping both for the bees and for agriculture. Today I read this one: Urban beekeeping is harming wild bees saying that urban ...
-3
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1answer
67 views

If you only ate fruits, vegetables or smoothies would you be able to skip drinking water?

If you only ate fruits, vegetables or smoothies would you be able to skip drinking water? I do not see some animals (like squirrels) drinking water daily (doesn't mean they don't have a water source) ...
8
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1answer
702 views

ID a shell from Puerto Rico

I recently found this in Rincon Puerto Rico on the beach. I assumed it was a baby sea turtle shell or some kind of turtle. Someone that frequents Puerto Rico said it was not. Does anybody know what ...
8
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4answers
2k views

Why do men grow facial hair?

Ancestral facial hair. Our closest ancestors, the chimpanzee and bonobo, both grow facial hair around the mouth area. What is noteworthy is that this is the case in both males and females of the ...
22
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3answers
5k views

Why is wombat scat (feces) shaped like cubes?

I've heard that wombat scat is cube shaped, but I don't understand how that can happen. Has anyone studied the phenomenon? What would the evolutionary pressure have been to cause this?
1
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0answers
1k views

Locomotion of Hydra: Why Somersaulting is better than Loop locomotion when moving to a larger distance?

In my text I read about different types of locomotion of Hydra where I learnt that generally Hydra moves by somersaulting and it is faster than 'Loop locomotion' which Hydra uses for moving to a large ...
3
votes
1answer
107 views

What kind of salamander is this?

This guy was found in central Virginia, under a flower pot. He's about 3 inches long, because part of his tail is either missing or it's just short. He looked dried out, so of course I wet my hand, ...
4
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0answers
54 views

Characteristics of 'true' tissue

Why are sponges not considered to have tissue level organization? Quite a few places seem to say that sponges do not have 'true tissue' and only have specialized cells. Unlike Protozoans, the ...
0
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0answers
38 views

How do tardigrades defend themselves from predators?

Tardigrades or water bears are well known for their ability to enter into a cryptobiotic state which allows them to survive extreme environmental conditions such as extreme temperatures or radiation. ...
-1
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1answer
35 views

Why do insect legs look so different from mammal legs? [closed]

Why do insects (and spiders and centipedes) have legs that are angled acutely upward then downward to meet the ground whereas mammals large and small all have straight legs that curve only slightly ...
-2
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1answer
62 views

The Perfect Predator? [closed]

I’m not a biology major or even studying it in any way so I apologize if this makes no sense. I’m curious, if say the Jurassic Park team came up to you and asked you to genetically engineer the ...
31
votes
2answers
11k views

Why is the Red Fox colored bright orange?

They're not poisonous or anything, so it can't be aposematism. As far as I know it doesn't come from diet like the flamingo. They're not apex predators, so they can't get away with it (like tigers), ...
3
votes
1answer
1k views

What shape is the pupil of squirrels?

In the animal kingdom there is a striking variety of pupil shapes, with great variety among relatively close relatives. Cats have vertical slits. Siberian tigers have round pupils. Cuttlefish have a W ...
1
vote
1answer
19 views

When should I use cryofixation and chemical fixation?

We know that the technique used in TEM sample preparation involves multiple steps, one of the most important of them is fixation. Fixation can be of two types: Cryofixation, that suggests that the ...
0
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0answers
21 views

How does a bone know the final shape it has to attain (and then maintain)?

How do osteoblasts and osteoclasts share information with each other to maintain this shape?
2
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1answer
4k views

Larva in cat's water dish

Can anyone help me identify this tiny larva I found in my cat's water dish and tell me how it got there?
1
vote
1answer
70 views

Bed bug or booklouse? [duplicate]

I found this creature climbing on the lower part of a wall inside apartment. Can you distinguish if it's a bed bug nymph or a booklouse? Sorry the photo quality isn't great, because it's so small (2 ...
0
votes
0answers
17 views

Have scientists tried to communicate with Sperm whales?

I see lots of passive studies of sperm whale click "language", usually focused on fingerprinting to identify groups and individuals. There's application of deep learning, and all sorts of ...
6
votes
2answers
3k views

What is this feather like bug with no legs?

Seen on leaf in North Texas, USA in April 2017. Critter will attach itself to any object put next to it.
8
votes
3answers
650 views

Identification of this spider?

I find these in forests in Oregon, western half, though they're probably on the eastern half as well. They live under pieces of wood and bark, and have a small web across the ground. Mine will eat ...
0
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1answer
105 views

What is the name of this insect?

This insect was found in my garden in India on the evening of August 07, 2019. It's rainy season here.
0
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1answer
63 views

What is this African bug?

This is an arthropod I found in an apparently abandoned mongoose burrow in the Maasai Mara game reserve, Kenya: That was the best photo I could get of it. From what I could tell, it had six legs and ...
49
votes
2answers
3k views

Help identifying leaf-like bone

I found two of these objects near a creek in Missouri. They feel like they are made out of bone but they do not look like any bone I have seen before. They also appear as though the could be some sort ...
3
votes
1answer
92 views

What is this soil digging insect?

It is in Texas(Month: May). Are these flying ants?termites? or Cicada Killers?
10
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2answers
180 views

Can a shark stall?

Today in marine biology I learned that, like airplanes, sharks use their pectoral fins to generate lift. The question that neither me or my Professor know is if a shark can or cannot stall. A ...
1
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0answers
50 views

What is this worm like animal found on a well water filter?

This was found in the water filter on a private water well that feeds a house in southeast Colorado, USA. The well has hard water, and is shallow (25’). There are several of these creatures all over ...
1
vote
0answers
34 views

What mammals can rotate and move their ears the most?

I found out that rabbits can rotate their ears 270 degrees, and also move them up, down and independently. Are there any other mammals that can control their ears' position that well, or even better?
0
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0answers
21 views

Why mammals don't have renal portal system

I am a high school student and I am a little confused why mammals don't have renal portal system?, some books says that because we have four chambered heart, so our blood is filtered more effectively ...
0
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0answers
21 views

Infectious deadly disease among free animals?

Sorry for the presumably naive question, I'm not a biologist and searched for that but didn't find a clear answer to this question. What I would like to know if deadly infectious diseases are common ...
5
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2answers
4k views

Are these cats calico?

Calico cats are cats that have 3 fur colors and are always female or males two X chromosomes. I've seen many cats that will have 2 fur colors (one of them is usually white) and another, third, color ...
2
votes
1answer
138 views

What type of guatemala beetle is this?

it was in Guatemala it was really big like 4 inches sorry I don't have a better photo
0
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3answers
91 views

What is the primary cause of death for small animals in urban and suburban areas?

Small birds (sparrows, robins, jays, finches) and mammals (squirrels, rats, opossums, raccoons) are a common sight in many urban and suburban communities with green space. However, I observe carcasses ...
8
votes
1answer
130 views

Do other young mammals turn their backs to their parent when upset?

I have noticed that upset toddlers turn their back to someone who wronged them and huff. Most adults don't do this, so I don't know how this could be a learned behaviour. Do other animals express this ...
0
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0answers
35 views

WC small organisms ID?

I have reached the end of my Winogradsky Column experiment, but out of interest I have kept them for a little longer. I have noticed small bug- and worm-like organisms appearing in some of my columns. ...
3
votes
0answers
271 views

What is blood pH for different animals?

So we all know that humans average blood pH is 7.4. But is it the same for the animals? I need examples of animals with the same blood pH as humans and the ones with different blood pH. I guess dogs ...
0
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0answers
38 views

Why do wasps (Vespula vulgaris) build a new nest every year?

I have been searching it for a while, and i haven't found an answer, why do common wasps (Vespula vulgaris) create a new nest every year instead of using the previous one if the old one is still ...
-3
votes
1answer
87 views

Spontaneous generation of fruit flies

I live in the South of England. It is currently winter. Whenever I buy bananas, even one, if I leave the discarded banana peel in my kitchen, within hours or even minutes, there is a cloud of little ...
5
votes
1answer
2k views

What are the predators of Glaucus atlanticus?

I'm researching the Glaucus atlanticus, also known as the blue glaucus, among various other names, but after reading quite a few articles and searching on the Internet as many different ways as I can ...
3
votes
0answers
54 views

Why is the spinal cord shortened in some vertebrates (cauda equina) but not in others?

Hodos, 2009, mentions that the "spinal cord tail" that humans have is not present in most vertebrates. This page mentions cauda equina is not present early on in human embryonic development, ...
1
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0answers
36 views

Do some birds really clean themselves using wet leaves?

While researching native shrubs to put in my garden for bird habitat, I read that some birds will take advantage of bushes to clean themselves by rubbing themselves against a wet leaf after rainfall (...
38
votes
1answer
7k views

Insect identification - Is this a bedbug?

This bug was found on a couch in Cape Girardeau, Missouri. The couch, and the two beds in the room show no signs of other bugs. Is this a bed bug that I should worry about or something harmless? It ...
1
vote
1answer
35 views

How many hairs per sq. cm. (or inch) do hamsters have on average?

How many hairs per square centimeter (or inch) do common pet hamsters (Mesocricetus auratus or Phodopus sungorus) have on average? I thought this would be easy to find by googling, but the best I've ...
0
votes
1answer
37 views

The Fish-Tetrapod Transition, evolution of the “elbow” in Stem Tetrapods

The Acanthostega and Tulerpeton limbs seem to form "elbows" in an axis perpendicular to the flexor and extensor plane of the fin. They seem to "flex" their "elbow" ...
3
votes
1answer
75 views

What is the name of this bird from Tanzania?

I took this picture in late 2018 in Tanzania. The Birds of East Africa book does not include it and I've been unable to identify it looking on the web. Can someone help me identify it, please. Thank ...
0
votes
0answers
50 views

What type of creature makes those mounds?

Location: South Ireland, Appeared: 2020 Nearest river: 500 meter down hill south Water is running down the hill also but there’s drainage to not flood the grass Seen before: potted plant I used earth ...
-2
votes
1answer
19 views

Sprawling locomotion, are knee/elbow joints perpendicular to erect locomotion?

The first terrestrial animals used sprawling locomotion. Is the knee and elbow jointed perpendicular to the joints in erect locomotion? It is easy to assume so, based on how the limbs move in ...
7
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3answers
1k views

Did dinosaurs have more than one brain? If so, why?

I once remember reading (15 years ago) that dinosaurs had two brains. One for their head and another one for their digestive functions. What is the current opinion on this theory? Has more evidence ...

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